Effects of different <i>Rht-B1b, Rht-D1b and Rht-B1c</i> dwarfing genes on agronomic characteristics in wheat
2006
Li, Xing-Pu | Lan, Su-Que | Liu, Yubing | Gale, M. D. | Worland, T. J.
The value of different dwarfing genes in winter wheat breeding was studied using 6 near-isogenic lines carrying different <i>Rht</i> dwarfing genes over three years experiment. Results showed that both the <i>Rht-B1b</i> and <i>Rht-D1b</i> semi-dwarfing genes had significantly positive effects on kernel number and grain weight per spike, and had significantly negative effects on 1000-grain weight comparing to the tall line (<i>Rht-B1a</i>). The <i>Rht-B1c</i> dwarfing gene had a significantly negative effect on kernel number per spike, and had positive effect on 1000-grain weight. The combination of the <i>Rht-D1b</i> and <i>Rht-B1c</i> gene showed significantly negative effect on yield components. All of these 5 dwarfing or semi-dwarfing genotypes mentioned above had significantly negative effect on plant height and no significantly effect on the area of flag leaf, spikelets per spike and spike length.
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